Power-hammer



No. 751,522. PATENTED FEB. 9, 1904.

A. A. KOCH.

POWER HAMMER.

APPLIoATIoN FILED H1B. 27. 190s.

No monm.. v 2 SHEETS-SHEET L WITNESSES: 5l g5 /NVE/VTO/ A TTOHNE YS.

No. 751,522. PATBNTED FEB. 9, 1904.

A. A.l KOCH.

POWER HAMMER.

ArPmoA'rloN FILED H1B. 27. 190s. No MODEL. Y 2 SHEETS-SHEET 2.

. A 770/?NE Y S.

Patented February 9, 1904.

PATENT OFFICE.

ARTHUR ALFRED KOCH, OF MONIEZUMA, IOWA.

POWER-HAMMER.

l. SPECIFICATION forming part of Letters Patent No. 751,522, dated February 9, 1904.

Application led February 27, 1903. ySerial No. 145,326. (No model.)

To MZ whom it may concern:

Be itknown that I, ARTHUR ALFRED Kool-T, a citizen ofthe United States, and a resident of Montezuma, in the county of Poweshiek and State of Iowa, have invented a new and Improved PowereHammer, of which the following is a full, clear, and exact description.

` This invention relates to improvements in power-hammers, an object being to provide a simple means for quickly changing the fulcrum-point of the hammercarrying lever, and consequently changing the length ofthe hammer movement without changing the length of the eccentric-rod, as is generally practiced.

I will describe a power-hammer embodying my invention and then point out the novel features in the appended claims. j

Reference is to be had to theaccompanying drawings, forming a part of this specication, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 i's a side elevation of a power-hammer embodying my invention. Fig. 2 is a plan view thereof. Fig. 3 is a front elevation, and Fig. 4 is a sectional detail view showing the fulcrum-pin.

Referring to the drawings, 1 designates the baseof the power-hammer, on which is a post or standard 2 and an anvil 3, the said anvil being removably seated in a boxing 4, attached to the base. The hammer-carrying lever 5 is 'longitudinally slotted, and the hammer 6 is attached thereto by means of an iron yoke 7, from the ends of which a leather or similarly iexible strap 8 extends through an opening in the end of said lever 5. One end of the strap 8 is connected to the yoke 7 by means of links 10, and connected to the other end of the yokev by means of a screw-rod 11 are tightening-nuts 12. By manipulating these nuts it is obvious thatthe tension of the strap 8 may be changed as desired. By employing the iexible strap 8 the jar of the hammer upon striking is materially lessened. The lever 5 is fulcrumed on a pin 13, a block 14 on said pin being movable in a slot in the lever. Also on the pin 13 are blocks 15, adapted to slide in slotted guides 16, rigidly attached to the upper portion of the post 2. rIhese guides are arranged at a forward and downward angle,

so that by moving the pinf13 along the same the fulcrum-point of the lever 5 maybe changed to regulate the thrust or length of movement of the hammer, and this changing of the ful? crum-point may be done while the machine is in motion through the agency of a lever 17,

having a foot-plate 18, the said lever being pivoted to the post or standard 2 and engaging at its upper end with one end of the fulcrum-pin. A member 19 is attached to the lever 17 and extends around the post 2 and y connects with the opposite endof the fulcrumpin. The lever 17 is held as adjusted by engaging with a rack 20. The rear end of the lever 5 is pivotallyconnected to an eccentric-rod 21, consisting ofI two threaded sections engaged by a turnbuckle 22, by means of which the rod may be shortened or'lengthened, as occasion may require through wear, or to provide for a greater or less throw of the hammer than is f possible through the agency of changing the fulcrum. The eccentric-rod engages with an eccentric 23 on a shaft 24, which has a bandwheel 25, engaged by a band 26, .driven from any desired source. At one side ofthe bandwheel25 is a brake-disk 27, designed to be engaged by a brake-shoe 28 on an angle-lever 29, pivoted to a stud 30 on the base of the machine.

A belt-tightener, consisting of a roller 31, is mounted on an arm 32, pivotally connected to the upwardly-extended portion of the angle-lever 29, and the roller 31 may bel adjusted outward or inward with relation to the belt and held in such adjustment by means of a bolt 33, passing through an arc-slot 34 in the upper end of the angle-lever. Afoot-treadle 35 is pivoted to a stud 36 on the base, and the forward end of this foot-treadle is extended around the boxing 4, so that it maybe readily reached by the foot of the operator standing at any point around the anvil. The rear end of the treadle is curved upwardand connected by means of a link 37 with thel upwardly-extended portion of the angle-lever 29.

To prevent the lengthwise movement of the hammercarrying lever, it is connected by means of straps 38 with the forward ends of the guides 16. The rear ends of'these straps 38 are here shown as connecting with a pivot IOO attaching the lever 5 to the eccentric-rod. The hammer 6 is movable in guides 39, adjustably attached to an arm 40, extended forward from the post or standard 2.

When the machine is in operation, the attendant holds the forward end of the treadle 35 down, consequently tightening the belt on the belt-pulley and releasing the brake. When the operation of the machine is stopped7 the attendant removes his foot from the treadle and the tightened belt will cause the tightener 31 to be thrown rearward, which will move the brake-Shoe 28 into engagement with the brake-wheel, where it will be held by the weight of the pulley 31.

As before stated, the fulcrum-point of the hammer-carrying lever may be changed by moving it up or down the incline of the guides while the machine is in operation.

Having thus described my inventionlclaim as new and desire to secure by Letters Patentl. A power-hammer, comprising a standard, downwardly-inclined guides attached` to the standard, a fulcrum-pin supported by said guides, a hammer-carrying lever mounted on thc pin, a foot-actuated lever connecting with one end of said pin, and a member attached to the lever and connecting' with the other end of said pin.

2. A power-hammer, comprising a standard, downwardly-inclined guides attached to the standard, a fulcrum-pin supported by said guides, a hammer-carrying lever mounted on the pin, a foot-actuated lever connecting with one end of said pin, a member extended from said lever to the other end of said pin, andan eccentric mechanism for operating' the hammer-carrying lever.

3. A power-hammer, comprising a standard, guides on said standard, a fulcrum-pin movable along said guides, a hammer-carrying lever mounted on said pin,a connection between said lever and said guides to prevent length- Wise movement of the lever, and means for actuating the lever.

In testimony whereof I have signed my name to this speciiication in the presence of two subscribing' witnesses.

ARTHUR ALFRED KOCH.

Vitnesscs:

CHARLES W. CLARK, JENNIE ALLELY. 

